Li Xin, Sun Xiaohong, Gao Zhiwen, Hu Xudong, Ling Rui, Cai Shu, Zheng Chunming, Hu Wenbin
School of Materials Science and Engineering, Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin, 300072, P. R. China.
Department of Chemistry & Biochemistry, University of California, Santa Barbara, California, 93106, USA.
ChemSusChem. 2018 May 9;11(9):1549-1557. doi: 10.1002/cssc.201800073. Epub 2018 Apr 17.
SnS /graphene composites have attracted extensive attention in energy storage owing to their excellent electrochemical performance. However, most of the previous methods to synthesize SnS /graphene composites require long times, high temperatures, or high pressures, which are obstacles for practical low-cost production. A simple one-pot strategy to prepare SnS /graphene composites has been developed, which is not time-consuming (1 h) and requires moderate temperature (75 °C) in atmosphere. Through this method, ultrafine SnS nanoparticles anchored on graphene nanosheets are prepared and exhibit excellent electrochemical performance for both lithium and sodium storage. Specifically, as anodes for lithium-ion batteries, the SnS /graphene electrode delivers a high capacity of 1480 mAh g after 50 cycles at 0.2 A g . Even at 10 A g , the SnS /graphene electrode can achieve a capacity of 666 mAh g . A constructed full lithium-ion cell exhibits a capacity of 957 mAh g after 50 cycles at 1 A g . This simple one-pot strategy may pave the way for large-scale production and practical application of SnS /graphene composites in energy storage.
硫化锡/石墨烯复合材料因其优异的电化学性能在能量存储领域引起了广泛关注。然而，以往合成硫化锡/石墨烯复合材料的大多数方法都需要较长时间、高温或高压，这对实际的低成本生产来说是障碍。一种制备硫化锡/石墨烯复合材料的简单一锅法已被开发出来，该方法不耗时（1小时），且在大气环境中需要适中的温度（75°C）。通过这种方法，制备出了锚定在石墨烯纳米片上的超细硫化锡纳米颗粒，其在锂存储和钠存储方面均表现出优异的电化学性能。具体而言，作为锂离子电池的阳极，硫化锡/石墨烯电极在0.2 A g的电流密度下循环50次后，具有1480 mAh g的高容量。即使在10 A g的电流密度下，硫化锡/石墨烯电极仍能实现666 mAh g的容量。构建的全锂离子电池在1 A g的电流密度下循环50次后，容量为957 mAh g。这种简单的一锅法可能为硫化锡/石墨烯复合材料在能量存储领域的大规模生产和实际应用铺平道路。
